Oral B CrossAction replacement electric toothbrush heads.Perfectly angled to reach deep between teethBristles clean tooth by tooth to help remove up to 100% plaqueIndicator bristles fade as a sign to replace your toothbrush head for a better cleanCompatible with the entire line-up of Oral-B electric toothbrushes, except for Oral-B sonic toothbrushesOral-B No. 1 brand used by dentists worldwide